65625243589 has 2 divisors, whose sum is σ = 65625243590. Its totient is φ = 65625243588.

The previous prime is 65625243559. The next prime is 65625243631. The reversal of 65625243589 is 98534252656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65487369025 + 137874564 = 255905^2 + 11742^2 .

It is a cyclic number.

It is not a de Polignac number, because 65625243589 - 2⁷ = 65625243461 is a prime.

It is a super-2 number, since 2×65625243589² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65625243529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32812621794 + 32812621795.

It is an arithmetic number, because the mean of its divisors is an integer number (32812621795).

Almost surely, 2^65625243589 is an apocalyptic number.

It is an amenable number.

65625243589 is a deficient number, since it is larger than the sum of its proper divisors (1).

65625243589 is an equidigital number, since it uses as much as digits as its factorization.

65625243589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552000, while the sum is 55.

The spelling of 65625243589 in words is "sixty-five billion, six hundred twenty-five million, two hundred forty-three thousand, five hundred eighty-nine".